634353397 has 2 divisors, whose sum is σ = 634353398. Its totient is φ = 634353396.

The previous prime is 634353383. The next prime is 634353439. The reversal of 634353397 is 793353436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541539441 + 92813956 = 23271^2 + 9634^2 .

It is a cyclic number.

It is not a de Polignac number, because 634353397 - 2¹¹ = 634351349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634353347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317176698 + 317176699.

It is an arithmetic number, because the mean of its divisors is an integer number (317176699).

Almost surely, 2^634353397 is an apocalyptic number.

It is an amenable number.

634353397 is a deficient number, since it is larger than the sum of its proper divisors (1).

634353397 is an equidigital number, since it uses as much as digits as its factorization.

634353397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 43.

The square root of 634353397 is about 25186.3732403060. The cubic root of 634353397 is about 859.2319612193.

The spelling of 634353397 in words is "six hundred thirty-four million, three hundred fifty-three thousand, three hundred ninety-seven".